gregg: a week after the school shooting in newtown, connecticut, and we're still hearing many stories of heroism in the middle of all that violence. we're hearing from a woman that worked as a reading consultant in the elementary school. she said the principal saved her life when the gunman opened fire. >>> my principal dawn hochsprung and mary sherlach, they went out in the hall to check out the noise. they didn't know it was gunshots. when they realized it was gunshots, natalie hammed monday, the three of them were shot and yelled back, shooter stay put. they saved my life and life of four others at that meeting. my message that i want all school people to know, anyone who has children in school, that works in a school, please be sure the door is locked from the inside. because our did not, teachers can't be out in a hall when a shooter is present in your school. that simple thing can make a difference in time and safety of the children. make sure the doors lock from the inside. that is what i want to say. i want to tell you that i'm very proud to work at sandy hook school and so ma